12957957 has 6 divisors (see below), whose sum is σ = 18717062. Its totient is φ = 8638632.

The previous prime is 12957953. The next prime is 12957991. The reversal of 12957957 is 75975921.

12957957 is a `hidden beast` number, since 1 + 29 + 579 + 57 = 666.

It can be written as a sum of positive squares in only one way, i.e., 12047841 + 910116 = 3471^2 + 954^2 .

It is not a de Polignac number, because 12957957 - 2² = 12957953 is a prime.

It is a super-2 number, since 2×12957957² = 335817299227698, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12957953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 719878 + ... + 719895.

Almost surely, 2^12957957 is an apocalyptic number.

It is an amenable number.

12957957 is a deficient number, since it is larger than the sum of its proper divisors (5759105).

12957957 is a wasteful number, since it uses less digits than its factorization.

12957957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1439779 (or 1439776 counting only the distinct ones).

The product of its digits is 198450, while the sum is 45.

The square root of 12957957 is about 3599.7162388166. The cubic root of 12957957 is about 234.8797151138.

The spelling of 12957957 in words is "twelve million, nine hundred fifty-seven thousand, nine hundred fifty-seven".